If someone wants to show pre-1.4 blocks, then they're gonna have to make those themselves (by setting the category and shape). Since not many people use those, there's not really any reason to add those.
As for BYOB
Not all.
basically the only ones are
[scratchblocks]
(the () block::operators)
the script{::grey cap
}::operators hat cap
[/scratchblocks].
And, you can make them already
I did actually add special corner roundness for multiline ring blocks, specifically for snavanced (formerly super-snap).
Snap! style is pretty much that, isn't it?
That is a good advance, but Snavanced! "was" formerly Super-Snap!,
I deleted everything about Super-Snap! before I am doing the math update. 
No, there are many different things that don't look like snap, like hat blocks, number inputs, block shading, and many other things that make it not look like snap. Snap is just generally a lot cleaner than scratch 1.4.
Ah. Of course BYOB was exactly Scratch 1.4 style, and Jens was pretty much trying to duplicate it in Snap!. I do remember that hat blocks took a long time to get just right.
I just looked at byob, and found that these are the only blocks I need to add
Here's what hat blocks looked like
Compare that to snap
Scratch 2 hat blocks look more like scratch 1.4 than snap
I'd say snap looks the best.
As for other blocks, I feel snap still looks different from scratch 1.4
Oh yeah, by the way, snap actually has a slight drop-shadow on the text, which BYOB (or scratch 1.4) doesn't have. Seriously, that's a tiny detail that I wish scratch would do.
I also found:
Individual true and false blocks in BYOB3.
I made a logo for snapblocks:
(font is Montserrat)
Does it look good for you?
If it isn't, can someone redesign the logo?
Oh yeah, I redesigned the previous logo and now looks like this:
How about
This one has little or no decoration. What about:
Okay.
I remade it, feel free to edit
SVG:
PNG:
Font is also Montserrat
Why is this icon aliased?
why would i know
I can see the pixels on it, where they start and stop abruptly without fading.
I say make the logo with the program itself, spell out snapblocks out of textboxes or something.
The swoosh of the hat block has jaggies, that's what @tethrarxitet is seeing.
If you guys are going to mess with fonts, italicize the exclamation point! :~)